/*
 * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package com.sun.corba.se.impl.oa.poa;

import java.util.Enumeration;

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;
import org.omg.PortableServer.ServantManager;
import org.omg.PortableServer.ServantLocator;
import org.omg.PortableServer.ForwardRequest;
import org.omg.PortableServer.POAPackage.NoServant;
import org.omg.PortableServer.POAPackage.WrongPolicy;
import org.omg.PortableServer.POAPackage.ObjectNotActive;
import org.omg.PortableServer.POAPackage.ServantNotActive;
import org.omg.PortableServer.POAPackage.ObjectAlreadyActive;
import org.omg.PortableServer.POAPackage.ServantAlreadyActive;
import org.omg.PortableServer.ServantLocatorPackage.CookieHolder;

import com.sun.corba.se.impl.orbutil.concurrent.SyncUtil;
import com.sun.corba.se.impl.orbutil.ORBUtility;
import com.sun.corba.se.impl.orbutil.ORBConstants;

import com.sun.corba.se.spi.oa.OAInvocationInfo;
import com.sun.corba.se.impl.oa.NullServantImpl;

/**
 * Implementation of POARequesHandler that provides policy specific
 * operations on the POA.
 */
public class POAPolicyMediatorImpl_NR_USM extends POAPolicyMediatorBase {

  private ServantLocator locator;

  POAPolicyMediatorImpl_NR_USM(Policies policies, POAImpl poa) {
    super(policies, poa);

    // assert !policies.retainServants() && policies.useServantManager()
    if (policies.retainServants()) {
      throw poa.invocationWrapper().policyMediatorBadPolicyInFactory();
    }

    if (!policies.useServantManager()) {
      throw poa.invocationWrapper().policyMediatorBadPolicyInFactory();
    }

    locator = null;
  }

  protected java.lang.Object internalGetServant(byte[] id,
      String operation) throws ForwardRequest {
    if (locator == null) {
      throw poa.invocationWrapper().poaNoServantManager();
    }

    CookieHolder cookieHolder = orb.peekInvocationInfo().getCookieHolder();

    // Try - finally is J2EE requirement.
    java.lang.Object servant;
    try {
      poa.unlock();

      servant = locator.preinvoke(id, poa, operation, cookieHolder);
      if (servant == null) {
        servant = new NullServantImpl(poa.omgInvocationWrapper().nullServantReturned());
      } else {
        setDelegate((Servant) servant, id);
      }
    } finally {
      poa.lock();
    }

    return servant;
  }

  public void returnServant() {
    OAInvocationInfo info = orb.peekInvocationInfo();
    if (locator == null) {
      return;
    }

    try {
      poa.unlock();
      locator.postinvoke(info.id(), (POA) (info.oa()),
          info.getOperation(), info.getCookieHolder().value,
          (Servant) (info.getServantContainer()));
    } finally {
      poa.lock();
    }
  }

  public void etherealizeAll() {
    // NO-OP
  }

  public void clearAOM() {
    // NO-OP
  }

  public ServantManager getServantManager() throws WrongPolicy {
    return locator;
  }

  public void setServantManager(ServantManager servantManager) throws WrongPolicy {
    if (locator != null) {
      throw poa.invocationWrapper().servantManagerAlreadySet();
    }

    if (servantManager instanceof ServantLocator) {
      locator = (ServantLocator) servantManager;
    } else {
      throw poa.invocationWrapper().servantManagerBadType();
    }
  }

  public Servant getDefaultServant() throws NoServant, WrongPolicy {
    throw new WrongPolicy();
  }

  public void setDefaultServant(Servant servant) throws WrongPolicy {
    throw new WrongPolicy();
  }

  public final void activateObject(byte[] id, Servant servant)
      throws WrongPolicy, ServantAlreadyActive, ObjectAlreadyActive {
    throw new WrongPolicy();
  }

  public Servant deactivateObject(byte[] id) throws ObjectNotActive, WrongPolicy {
    throw new WrongPolicy();
  }

  public byte[] servantToId(Servant servant) throws ServantNotActive, WrongPolicy {
    throw new WrongPolicy();
  }

  public Servant idToServant(byte[] id)
      throws WrongPolicy, ObjectNotActive {
    throw new WrongPolicy();
  }
}
